Boring mechanism.



No. 826,755; PATENTED JULY 24, 1906.

. E. WALDRON.

BORING MECHANISM. APPLICATION FILED JUNE 2, 1905.

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ATTORNEY.

THE NORRIS PETERS co.. WASHINGTON, o. c.

E. WALDRON.

BORING MECHANISM. uruomroiu FILED mu 2, 1905.

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UNITED STATES EDWARD WALDRON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR' TO WALDRON FLEXIBLE ROTARY ENGINE COMPANY, OF CAMDEN, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BORING. MECHANISM".

Specification of Letters Patent.

Patented July 24. 1906.

To all whom it may concern:

Be it known that I, EDWARD WALDRON, a subject of the King of Great Britain, residing at Philadelphia, in the county of Philadel phia and State of Pennsylvania, have invented certain Improvements in Boring Mechanism, of which the following is a specification.

This invention relates to mechanism for boring chambers of irregular contour, such as are required in rotary engines or pumps, forming cams, and turning other irregular surfaces of like character; and it has forits leading purpose to provide simple apparatus applicable to a lathe for turning such surfaces automatically and accurately.

In the accompanying drawings, Figure 1 represents a side view of the invention applied to a lathe, parts being broken away. Fig. 2 is a transverse sectional view thereof. Fig. 3 is a face view, and Fig.4 is a side view, of one of the formers. Fig. 5 is an enlarged transverse sectional view taken throu h part of a former. Fig. 6 is a face view, and Fig. 7 is a transverse sectional view, of a bearingfor supporting the boring-bar guide-heads. Fig. 8 is a sectional view of the guide-head carried by the tail-stock of the lathe. Fig. 9 is a sec.- tional view of the guide-head carried by the head-stock of the lathe. Fig. 10 is a face View of a guide-head, the boring-bar being shown in section. Fig. 11 is an elevation of the tool-holder and tool, and Fig. 12 is a sectional view of the boring-bar and tool-holder with the tool held therein.

As shown in the drawings, the mechanism comprises a pair of formers consisting of the respective rings 1 1 provided with the feet 2 2, the latter engaging the bed 3 of a lathe, to

I which they are secured by the bolts 4, and

the disks 5 5, having the irregular openings 6 6, and the concentric races 7 7 and 8 8 thereon, corresponding to the configuration to be bored. These rings or skeletons provide for the substitution of disks or body por-,

tions having different configurations as may be re uired for turning the particular surfaces esired.

The boring-bar 9 lies within the openings 6 6 and is revolved therein by the guideheads 10 10, having the sockets 11 11,'in which the bar is held by the pins 12 12.

Races 13 13 in the respective guide-heads by cables 2424, passing through. the sheaves 25 and having the weights 26' 26 thereon, by which the guide-heads and boring-bar are counterbalanced. The respective guideheads have thereon arms'27 27 provided with guides 28 28 for adjustably engaging the blocks 29 29, which carry the spindles 3.0 30,

having'the rollers 31 31 and 32 32 thereon.

These rollers engage the corresponding-races 7 7 and 8 8 of the formers.

A tool-holder 33 is sleeved on the boringbar between theformers, and the-tool 34: is set-in the socket 35- of the bar and holder, the arrangement being such that the axes: of the tool and guide-arms liein a common plane. The tool is adjustecl' longitudinally in the socket by the set-screw 36 and is held against turning by the screw 37, set in the-holder and engaging the longitudinal. groove 38 of the tool, the cutting-face 34 of the tool. and the bottom of the groove being in a common plane, so that the groove forms a guide for facing the tool.

The revolution of the live-spindle 16 and the face-plate 20 thereon is transmitted to the uide-head 10, the bar 9, and the guideheac 10 The arms 27 and 27 of the guideheads being engaged by the respective rollers thereon to the races in the former-rings 5 and 5, the guide-head 10 is reciprocated upon the blocks 14 and 18 and the guide-head 10 is reciprocated upon the block 14, so that the cutting edgeof the tool 34 traces a surface symmetrical to the races of the formers. These races providing both internal and external guides for the rollers controlling the movements of guide-heads and the rollers of each pair moving independently on its own race, the movement of the tool is accurately guided and the movement is free. The work being secured upon the carriage 39, the tool revolves therein and turns a configuration corresponding to that of the formers.

, Having described my invention, I claim 1 1. A boring-bar, a cutting-tool fixed to said bar intermediate of its ends, revolving races connected respectively with the ends of said bar, a revolving driving mechanism connected with one of said races, and a former connected with and reciprocating said baras it is revolved by said driving mechanism.

2. A boring-bar having a cutting-tool disposed transversely thereto, a revolving driv- :ing mechanism and a revolving supporting mechanism, means for connecting said bar in reciprocating relation to said driving and supporting mechanisms and a stationary former .connected with and reciprocating said bar. and tool as they are revolved by said driving mechanism. 1

3. A boring-bar, a cutting-tool connected in'adjustable relation to said bar, stationary .formers, guide-heads on the ends of said bar having revoluble connections with said form- 'ers, and means for supporting and revolving volving said device, said means having a re-' ciprocating connection with said supporting and driving mechanism.

6.. A boring-bar, a cutting-tool connected therewith, guide-heads respectively fixed to 5 the ends of said bar, said guide-heads having races therein, revolving mechanism engaging said races, and formers having races with which said guide-heads have movable connections. a

7. A boring mechanism comprising toolholding means, guide-heads fixed to the ends of said tool-holding means, said guide-heads having races therein, revolving mechanism with which said races have reciprocating connections, stationary formers with races therein, and rollers eccentrically connected to said guide-heads and movable in the races of said formers.

8. A boring mechanism comprising a former consisting of a skeleton and a body detachably connected thereto, said body having a race therein and an aperture therethrough.

9. A boring mechanism comprising a former consisting I of a skeleton with feet thereon for supporting and holding it stationary andan apertured body having a race therein.

10. A boring mechanism comprising a boring-bar, means'for holding a tool in adjustable relation thereto, guide-heads fixed to the ends of said bar, each of said guide-heads having an arm and a race, rollers connected adjustably to said arms, formers having races for engaging and guiding said rollers, spindles having guides connected with the races of said guide-heads, and counterbalanced bearings for balancing said guide-heads and the mechanisms supported thereby.

In testimony whereof I have hereunto set my hand, this 31st day of May, A. D. 1905,in the presence of the subscribing witnesses.

EDWARD WALDRON.

Witnesses:

ROBERT JAMEs EARLEY, UTLEY E. CRANE, Jr. 

